User Manual

cdLCD‐show/ 
./LCD35‐show180 
270 degree rotation
cdLCD‐show/ 
./LCD35‐show270 
Touch screen calibration
This LCD can be calibrated using a program called xinput_calibrator which is pre‐installed on the CD image.
However, it was not pre‐installed on original Raspbian OS. So in this case, you should get and install the
program manually with
sudoapt‐getinstall‐yxinput‐calibrator 
Enter the following commands for touch screen calibration:
sudoDISPLAY=:0.0xinput_calibrator 
or select Menu ‐> Preferences ‐> Calibrate Touchscreen.
After running these commands, there will be a prompt for four‐point calibration shown in the LCD screen.
Click the points one by one to finish the touch calibration. Then, the new calibration data will be displayed
in the terminal, as shows below. Please get these data for future use.
Doingdynamicrecalibration: 
Settingnewcalibrationdata:3919,208,236,3913 
Enter the following command to edit 99‐calibration.conf:
sudonano/etc/X11/xorg.conf.d/99‐calibration.conf 
Then, the old calibration data will be displayed in the terminal:
Section"InputClass" 
Identifier "calibration" 
MatchProduct "ADS7846Touchscreen" 
Option "Calibration" "16037233896181" 
Option "SwapAxes" "1"
EndSection 
Modify the calibration data to the new calibration data displayed in the step 2﴿:
Section"InputClass" 
Identifier "calibration" 
MatchProduct "ADS7846Touchscreen" 
Option "Calibration" "39192082363913" 
Option "SwapAxes" "1"
EndSection 